Home / 80,929,336.80-121,394,005.20-72,426,280.80

Finding the Fourth Proportional to 80,929,336.80, 121,394,005.20 and 72,426,280.80

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Solution

The fourth proportional to 80,929,336.80, 121,394,005.20 and 72,426,280.80 is: 108,639,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,929,336.80 : 121,394,005.20 = 72,426,280.80 : x
  2. Step 2: Convert to fraction form
    80,929,336.80/121,394,005.20 = 72,426,280.80/x
  3. Step 3: Cross multiply
    80,929,336.80x = 121,394,005.20 × 72,426,280.80
  4. Step 4: Simplify right side
    80,929,336.80x = 8,792,116,308,051,860
  5. Step 5: Solve for x
    x = 8,792,116,308,051,860/80,929,336.80
  6. Step 6: Final answer
    x = 108,639,421.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.